Any traveler to Las Vegas should enjoy any of the beautiful spas around town. Most casinos have them and if you purchase any of their treatments you usually can use the facilities for the entire day. For example, at the Green Valley Ranch Station Spa, you can purchase a massage and then use their private pool. They also have a yoga room, men/women sauna and steam rooms, gym, and jacuzzi. Depending on where you go will determine the amenities, but you will not be disappointed.
Most Spas offer everything you need to be there. For example, slippers, robes and towels are provided. Usually, there are beverages and snacks for your choosing. For additional charge, some spas offer spa menus and cocktail service. Generally, toiletries are provided as are ample towels. Lockers and changing areas are provided as well as towels and bottled water.
Plan to spend several hours at the SPA. Arrive early, get your treatments, and then enjoy the amenities!